From 62d78891ffd2cc65c2d33bedc5a9ade25dc10041 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 17 Mar 2021 12:34:57 +0000
Subject: [PATCH] staging/bcm2835-camera: Add support for DMABUFs

DMABUFs are all handled by videobuf2, so there is no reason not
to enable support for them.

Note that this driver is still using the vmalloc allocator, so
the buffers it allocates will not be compatible with the codec
or ISP driver that require contiguous buffers. However this
driver should be able to import the buffers allocated by them.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -1449,6 +1449,7 @@ static const struct v4l2_ioctl_ops camer
 	.vidioc_querybuf = vb2_ioctl_querybuf,
 	.vidioc_qbuf = vb2_ioctl_qbuf,
 	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
 	.vidioc_enum_framesizes = vidioc_enum_framesizes,
 	.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
 	.vidioc_g_parm        = vidioc_g_parm,
@@ -1928,7 +1929,7 @@ static int bcm2835_mmal_probe(struct pla
 		q = &dev->capture.vb_vidq;
 		memset(q, 0, sizeof(*q));
 		q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+		q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ | VB2_DMABUF;
 		q->drv_priv = dev;
 		q->buf_struct_size = sizeof(struct vb2_mmal_buffer);
 		q->ops = &bcm2835_mmal_video_qops;
